Bipolar Charging of Ultrafine Aerosol Particles

Open Access

5 June 1983

journal article
research article
Published by Taylor & Francis in Aerosol Science and Technology

Vol. 2 (4) , 421-427
https://doi.org/10.1080/02786828308958645

Abstract

The stationary bipolar charging characteristics of aerosol particles in the size range between 4.5 and 40 nm have been studied using a new technique whereby the particles neutralized by a ²⁴¹Am radioactive source are enlarged and directly observed in an electric field. The number ratio of charged particles to total particles obtained in this study was found to deviate from the charge distribution obtained from Boltzmann's law and to agree well with that calculated with the bipolar charging theory of Fuchs using his values for the ion properties. The ratio of positively charged to negatively charged particles was found to be approximately 0.35:0.65.

Keywords

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